CN204575298U - A kind of turbulent flow water body target detection system based on image restoration - Google Patents
A kind of turbulent flow water body target detection system based on image restoration Download PDFInfo
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- CN204575298U CN204575298U CN201520321271.7U CN201520321271U CN204575298U CN 204575298 U CN204575298 U CN 204575298U CN 201520321271 U CN201520321271 U CN 201520321271U CN 204575298 U CN204575298 U CN 204575298U
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Abstract
The utility model discloses a kind of turbulent flow water body target detection system based on image restoration, comprise LED transmitter module, bubble generation module, signal receiving module, cross correlation process module and image restoration module, this system obtains turbulent flow water body imaging detection target image and bubble diagram picture by double detector simultaneously, field of turbulent flow speed is measured according to bubble diagram picture, set up degradation model, adopt half blind deconvolution algorithm, carry out target image recovery, realize the specific aim of image restoration, obtain target image clearly, solve the degradation problems of turbulent flow water body detecting target image, improve image restoration quality.Meet the requirements such as miniaturization, low cost, high-performance, energy-conserving and environment-protective.
Description
Technical field
The utility model relates to a kind of turbulent flow water body target detection system based on image restoration, in turbulent flow water body, utilize bubble to detect field of turbulent flow in particular to a kind of and carry out a kind of turbulent flow water body target detection system of image restoration, belonging to submarine target technical field of imaging.
Background technology
In the Underwater Target Detection process in ocean, rivers and lake, turbulent flow water body can produce serious degradation effects to imaging detection target.Turbulent flow is the random motion of a kind of high frequency, and the motion of ocean water body in lake presents the liquid form of this complexity of turbulent flow mostly.In true marine environment, turbulent flow becomes the key factor affecting underwater target detection Yu detect other imaging authenticity (Distance geometry picture element).Existing much for the research of atmospheric turbulence at present, such as combine the numerical evaluation of environmental parameter on the spot according to existing various turbulence model, compare measured data and simulation result, and then obtain the turbulence model being applicable to local environment.And the research of turbulent flow under water is mainly concentrated in theoretical research, apply existing turbulence model and combine actual boundary condition and emulate.Along with the development of experimental technique and computer technology, study turbulent flow by experiment and obtain remarkable progress.
Particle imaging technique, due to its non-intervention advantage, is widely used in fluid flowing (being not limited only to turbulent flow) measurement.Existing water body image recovery method, most practicality be blind deconvolution filtering, the method is undertaken deconvoluting by hypothesis degradation model and Regularization interative computation carries out the recovery of image, but the method lacks certain specific aim.Based on this, the method for innovation is by measuring the turbulent flow in water body, thus carries out image restoration targetedly, greatly can promote the efficiency of Underwater Target Detection.
The particle imaging method of existing survey field of turbulent flow, generally add trace particle in the measurement of fluid liquid, as patent of invention " in a kind of current the dynamic display system of streak line and display packing thereof " (application number: trace particle 201210079105.1), this particle is special vitreum or fluorophor, the particle size of vitreum particle is uneven, and price is relatively cheap; The particle diameter consistance of fluorescent particles is good, but expensive, add the particle not reusable edible in water body due to these, that is add after in water body and can not be separated again and recycle, there is wasting phenomenon, the particle convection cell added on the other hand creates certain pollution.
Existing underwater object detecting set material, adopts the method improving sensor performance to improve Effect on Detecting mostly; Existing water body image recovery method, is the some diffusion model based on light transmition mostly, wherein then generally adopts existing theoretical model for turbulent flow water body, same shortage specific aim.
A kind of bubble that adopts is as trace particle, and the flowing of detection bubble in water body, thus the flowing of reflection water body, detect field of turbulent flow thus and carry out the restoring means of the submarine target image under Turbulent Flow Effects, does not see in publication or document.
Summary of the invention
The purpose of this utility model asked a question for background technology, design a kind of turbulent flow water body target detection system based on image restoration, detect simultaneously and record target image and bubble image in turbulent flow water body, measure field of turbulent flow speed according to bubble diagram picture, set up degradation model, adopt half blind deconvolution algorithm, carry out target image recovery, obtain target image device clearly, solve the degradation problems of turbulent flow water body detecting target image, improve image restoration quality.Meet the requirements such as miniaturization, low cost, high-performance, energy-conserving and environment-protective.
In order to achieve the above object, the utility model adopts following scheme:
Based on a turbulent flow water body target detection system for image restoration, it is characterized in that: comprising: LED transmitter module, bubble generation module, signal receiving module, cross correlation process module and image restoration module; Wherein:
LED transmitter module produces LED light signal detection bubble and submarine target module; Comprise: LED array lamp, microlens array and catoptron, the LED light signal that described LED array lamp is launched is divided into two-way, then respectively by the catoptron of described microlens array, realizes the imaging point illumination of submarine target in turbulent flow water body;
Bubble generation module produces bubble module in turbulent flow water body; Comprise: bubble generator, in described bubble generator, comprise molybdenum filament electrolytic water device; The bubble diameter produced is set as submillimeter magnitude;
Signal receiving module receives undersea detection target and bubble diagram as imaging point module; Comprise: the first optical receiver module, the second optical receiver module; Described first optical receiver module is used for fixing time shutter and frame frequency record two width bubble diagram picture, and described second optical receiver module utilizes imageing sensor to receive the imaging signal module of submarine target after turbulent flow water body;
Cross correlation process module is process bubble diagram picture and calculates field of turbulent flow acceleration module; Comprise: two the bubble diagram pictures received are carried out ratio of similitude to, according to the imaging mode of two frame list exposure, computing cross-correlation unit is carried out to the two width images successively gathered, and: choose suitable query area and window moves size, calculate two speed components of each interrogation zone and obtain whole particle image ve locity processing unit;
Image restoration module the target image signal of collection is sent into processor carry out image restoration processing module;
Described the first optical receiver module for signal receiving module and cross correlation process module calculate out the speed parameter of field of turbulent flow, as the priori of the turbulent flow degradation model of the second optical receiver module and image restoration module.
As mentioned above based on a turbulent flow water body target detection system for image restoration, it is characterized in that: described bubble diameter setting value is 0.01mm ~ 0.2mm.Its beneficial effect is: the bubble of this size dimension, and after entering turbulent flow water body, the flow velocity of its flowing velocity ability and water body is consistent, and therefore the speed of bubble diagram picture just can be equivalent to the fluid velocity of turbulent flow water body.
The utility model based on the principle of work of the turbulent flow water body target detection system of image restoration is:
The light signal produced by LED array is two ways of optical signals through lenticule component, wherein a road light signal is irradiated to undersea detection target by reflective mirror, another road light signal irradiates the part bubble produced by bubble generator, in first optical receiver module, CCD catches two width bubble diagram pictures with double exposure, adopt two frame list exposure recording mode, two width picture signals send into cross correlation process module, adopt cross correlation algorithm, its principle is that double exposure produces two width bubble diagram pictures respectively, in the first width bubble diagram picture, set the region that comprises single (or multiple) bubble.In the second width image, select the corresponding region containing identical bubble imaging in front width figure, calculate the similarity in this region in two width figure, both related coefficient i.e., large correlation coefficient value reflection be exactly same bubble on two width images as right, coordinate on peak value corresponding flat is exactly the right displacement of image of bubble, by the two-dimentional relation in field of turbulent flow direction of motion and bubble motion direction, can draw field of turbulent flow speed.Target image is caught by the imageing sensor of the second optical receiver module, send into computing machine and carry out image restoration process, can draw to there is motion in one dimension x (t) between imageing sensor and target according to field of turbulent flow speed, the probability density function of x (t) is just reflected in the intensity distributions of the plane of delineation.Utilize the first optical receiver module and close mutually the speed parameter that processing module calculates out field of turbulent flow, as the priori of the turbulent flow degradation model of the second optical receiver module and image restoration module.Because probability of motion density function is equal with diffuse images function, motion modulation transfer function can be estimated from probability density function, again half blind deconvolution algorithm application is restored in target image, main thought solves the mathematics pathosis problem of image restoration by regularization formula and rim detection as constraint, be retained in the profile details of image in image restoration process, obtain clear target image.
The beneficial effects of the utility model are:
(1) do light source with LED array, utilize microlens array technology improve LED optical property, improve get optical efficiency.
(2) utilize the bubble diagram picture of collection to calculate field of turbulent flow speed, adopt half blind deconvolution algorithm, improve image restoration quality.
(3) therefore this patent adopts bubble as the flowing of trace particle detection water body, does not free from environmental pollutionly also affect imaging.
(4) native system meets the requirements such as miniaturization, low cost, high-performance, energy-conserving and environment-protective, and cost performance is high, has very important meaning to the submarine target imaging detection application of various water body.
Accompanying drawing explanation
Fig. 1 is the utility model example structure block diagram.
Description of symbols in figure: 1-LED transmitter module, 2-detection of a target, 3-signal receiving module.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is described further:
As shown in Figure 1, a kind of turbulent flow water body target detection system based on image restoration of the utility model, comprises LED transmitter module 1, bubble generation module, signal receiving module 3, cross correlation process module and image restoration module; Wherein:
LED transmitter module 1 is for generation of LED light signal detection bubble and submarine target; Comprise LED array lamp, microlens array and catoptron, the LED light signal that described LED array lamp is launched is divided into two-way, by lenticule group, strengthens LED light performance, then through catoptron to the imaging point illumination of submarine target in turbulent flow water body.
Bubble generation module is used for producing bubble in turbulent flow water body; It is a bubble generator, this air bubble generator adopts the method for molybdenum filament brine electrolysis to produce bubble diameter at submillimeter magnitude (0.01mm ~ 0.2mm), the size of bubble diameter analogy fluorescent particles, is placed in turbulent flow water body, for generation of bubble by this bubble generator.The bubble of this size dimension, after entering turbulent flow water body, its flowing velocity can be consistent with the flow velocity of water body, and therefore the speed of bubble diagram picture can be equivalent to the fluid velocity of turbulent flow water body.
Signal receiving module 3 is for receiving undersea detection target and bubble diagram as imaging point, and signal receiving module 3 comprises the first optical receiver module, the second optical receiver module.Described first optical receiver module uses the time shutter and frame frequency record two width bubble diagram picture that CCD is fixing.Described second optical receiver module receives the imaging signal of submarine target after turbulent flow water body, utilizes imageing sensor to catch image information.
Cross correlation process module is for the treatment of bubble diagram picture and calculate field of turbulent flow speed, and its processing procedure comprises: two the bubble diagram pictures received are carried out ratio of similitude pair, according to the imaging mode of two frame list exposure, carries out computing cross-correlation to the two width images successively gathered.Choose suitable query area and window moves two speed components that size calculates each interrogation zone, obtain the speed of whole particle picture.First according to the coupling of lens and CCD image planes, image is intercepted, remove the non-imaged areas outside the lens field of image both sides.Then Poisson and the Gaussian noise of a variety of causes generation of video camera own is removed successively.The gray-scale value of last equilibrium figures picture and the method for employing structural element strengthen the identifiability of particle in image.After having carried out process, stress and strain model is carried out to image.Select suitable interrogation zone size again, cross correlation algorithm is done in the region corresponding to two width images, obtains the velocity vector of this point.Then small distance moves interrogation zone, carries out analyzing the velocity vector distribution obtaining whole image successively.
Image restoration module the target image signal of collection is sent into processor carry out image restoration processing module.
See accompanying drawing 1, the utility model is as follows based on the principle of work of the turbulent flow water body target detection system of image restoration:
The light signal produced by LED array 1 is two ways of optical signals through lenticule component, wherein a road light signal is irradiated to undersea detection target by reflective mirror, another road light signal irradiates the part bubble produced by bubble generator, in first optical receiver module, CCD catches two width bubble diagram pictures with double exposure, adopt two frame list exposure recording mode, two width picture signals send into cross correlation process module, adopt cross correlation algorithm, its principle is that double exposure produces two width bubble diagram pictures respectively, in the first width bubble diagram picture, set the region that comprises single (or multiple) bubble.In the second width image, select the corresponding region containing identical bubble imaging in front width figure, calculate the similarity in this region in two width figure, both related coefficient i.e., large correlation coefficient value reflection be exactly same bubble on two width images as right, coordinate on peak value corresponding flat is exactly the right displacement of image of bubble, by the two-dimentional relation in field of turbulent flow direction of motion and bubble motion direction, can draw field of turbulent flow speed.Target image is caught by the imageing sensor of the second optical receiver module, send into computing machine and carry out image restoration process, can draw to there is motion in one dimension x (t) between imageing sensor and target according to field of turbulent flow speed, the probability density function of x (t) is just reflected in the intensity distributions of the plane of delineation.Because probability of motion density function is equal with diffuse images function, motion modulation transfer function can be estimated from probability density function, again half blind deconvolution algorithm application is restored in target image, main thought solves the mathematics pathosis problem of image restoration by regularization formula and rim detection as constraint, be retained in the profile details of image in image restoration process, finally obtain clear target image.Half described blind deconvolution algorithm application, in target image recovery technique scheme, is to publish thesis " laser bubble detect in the edge regularization of image restore " (laser magazine, the 36th volume the 3rd phase in 2015) described scheme based on present inventor.
The utility model comprises based on the advantage of the turbulent flow water body target detection system of image restoration:
1, obtain turbulent flow water body imaging detection target image and bubble diagram picture by double detector simultaneously, by calculating field of turbulent flow speed to bubble image procossing, setting up image deblur model, realize the specific aim of image restoration, improve the quality of target imaging image.
2, utilize bubble to carry out the measurement of field of turbulent flow as trace particle, realize the principle that particle imaging is measured, free from environmental pollutionly also do not affect imaging.
3, the picture quality utilizing image restoration module targetedly to carry out turbulent flow water body promotes, and promotes Effect on Detecting as far as possible when existing low cost.
These are only embodiment of the present utility model, but be not limited to the utility model, all make within spirit of the present utility model and principle any amendment, equivalent to replace or improvement etc., all should be included within right of the present utility model.
Claims (2)
1. based on a turbulent flow water body target detection system for image restoration, it is characterized in that: comprising: LED transmitter module, bubble generation module, signal receiving module, cross correlation process module and image restoration module; Wherein:
LED transmitter module produces LED light signal detection bubble and submarine target module; Comprise: LED array lamp, microlens array and catoptron, the LED light signal that described LED array lamp is launched is divided into two-way, then respectively by the catoptron of described microlens array, realizes the imaging point illumination of submarine target in turbulent flow water body;
Bubble generation module produces bubble module in turbulent flow water body; Comprise: bubble generator, in described bubble generator, comprise molybdenum filament electrolytic water device; The bubble diameter produced is set as submillimeter magnitude;
Signal receiving module receives undersea detection target and bubble diagram as imaging point module; Comprise: the first optical receiver module, the second optical receiver module; Described first optical receiver module is used for fixing time shutter and frame frequency record two width bubble diagram picture, and described second optical receiver module utilizes imageing sensor to receive the imaging signal module of submarine target after turbulent flow water body;
Cross correlation process module is process bubble diagram picture and calculates field of turbulent flow acceleration module; Comprise: two the bubble diagram pictures received are carried out ratio of similitude to, according to the imaging mode of two frame list exposure, computing cross-correlation unit is carried out to the two width images successively gathered, and: choose suitable query area and window moves size, calculate two speed components of each interrogation zone and obtain whole particle image ve locity processing unit;
Image restoration module the target image signal of collection is sent into processor carry out image restoration processing module;
Described the first optical receiver module for signal receiving module and cross correlation process module calculate out the speed parameter of field of turbulent flow, as the priori of the turbulent flow degradation model of the second optical receiver module and image restoration module.
2. a kind of turbulent flow water body target detection system based on image restoration as claimed in claim 1, is characterized in that: described bubble diameter setting value is 0.01mm ~ 0.2mm.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107631960A (en) * | 2017-08-18 | 2018-01-26 | 浙江海洋大学 | Ocean material disperse and transport coefficient CCD monitors experimental provision and its monitoring method automatically |
| CN109166083A (en) * | 2018-09-03 | 2019-01-08 | 哈尔滨工业大学 | A method of for removing underwater picture bubble noise |
| US11525719B2 (en) * | 2017-11-17 | 2022-12-13 | ExxonMobil Technology and Engineering Company | Estimating flow velocity by harmonic excitation of injected microbubbles |
-
2015
- 2015-05-19 CN CN201520321271.7U patent/CN204575298U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107631960A (en) * | 2017-08-18 | 2018-01-26 | 浙江海洋大学 | Ocean material disperse and transport coefficient CCD monitors experimental provision and its monitoring method automatically |
| US11525719B2 (en) * | 2017-11-17 | 2022-12-13 | ExxonMobil Technology and Engineering Company | Estimating flow velocity by harmonic excitation of injected microbubbles |
| CN109166083A (en) * | 2018-09-03 | 2019-01-08 | 哈尔滨工业大学 | A method of for removing underwater picture bubble noise |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 Termination date: 20190519 |